I've had a bottle of Frederic Fekkai Brilliant Glossing Crème in some form or another (one was travel sized because I was feeling cheap, and another was so old I think it had a slightly different name...) for the better part of a decade. It was initially one of those purchases you make as a tween when, standing in front of the product wall at a salon after your first honest-to-God blowout, you resolve to buy anything that's going to make what you just paid $100 for (in the suburbs just north of Chicago, even 12 year olds pay up for their haircuts) last. And for maybe the last eight or so years, I haven't quite known what to do with it. Or really, what to do with any sort of generic styling cream. It's not like you can put some opaque goo on your hair and—boom!—it's styled. You've gotta put in some effort before you even get to the product. But of course, this was before four-day-old, slept-in hair was de rigueur.

Now that perfectly imperfect hair is the only style I have any interest in, I've finally found a regular use for my Glossing Crème. When you wake up several days into a blow out, a couple things happen: hair starts to look dull, and any artful wave that's been put in has probably fallen out. At the same time, you need something light that's not going to gunk up hair that's already on the gunk-teetering point. So, Glossing Crème—in all of its hyper-light, pastel-green glory—takes care of the shine with olive oil while somehow magically restoring any bend you had in the first place with a super-high water content. A pea-sized amount every morning of a blowout will do ya—and by day four, you won't even notice it bringing you down. And just like that, I've finally polished off the bottles I've had lying around.

—Emily Ferber

Photographed by Tom Newton. For more on products that are good 'til the last drop, read the rest of the Things We Finish series here.